There is only one remaining question

[Walt Cakebread]

I thought that was Marksman.

Marksman is the lowest rating...and it is unacceptable in the Marine corps....A recruit cannot graduate from boot camp with less than a Sharpshooter rating. 

[Joe Elliott]

He qualified as a sharpshooter, something most Marines were not about to do.

Perhaps you should check with the Marine Corps....  I believe you'll find that "Sharpshooter" designation is the minimum qualification that is acceptable for a Marine recruit. 
 

The three Marine categories are:
1.   Marksman (lowest)
2.   Sharpshooter (medium)
3.   Expert (expert)
In 1956, Oswald qualified as ?Sharpshooter?, the medium category. The same category as another Marine, Charles Whitman, who went crazy and killed about 16 people with a rifle in 1966. The longest range was over 400 yards. Like Oswald, it had been about 7 years since he had received his Marine training.
Most Marines only qualify at the lowest rating, ?Marksman?, which is still very good. One must still prove one is accurate at 200, 300 and 500 yards. In 1959, without retraining, Oswald scored as ?Marksman? which is a good score, although run of the mill for a Marine.
Maybe you should be the one to go check your facts and review the shooting categories of being a Marine.

[Joe Elliott]

Oswald was trained to hit targets at 200 yards, 300 yards and 500 yards. And he was pretty good at it. He qualified as a sharpshooter, something most Marines were not about to do. He should be able to hit a person at 88 yards, the longest shot taken on November 22?
 

Yeah, in 1956.  Cherry-pick much?
 

Charles Whitman in 1966, killed 16 people, the longest from a range of over 400 yards. Like Oswald, he had qualified as a Marine ?Sharpshooter? seven years earlier. And Whitman used a rifle he had just purchased that day and had never used before and was unfamiliar with.

Question:
Does it being seven years since Oswald had received his rifle training mean he was no longer accurate by 1963?

[Joe Elliott]

Marksman is the lowest rating...and it is unacceptable in the Marine corps....A recruit cannot graduate from boot camp with less than a Sharpshooter rating.

False. In 1956, most Maines who successfully qualified did so as ?Marksman?, the lowest of three acceptable ratings. To this day ?Marksman?, ?Sharpshooter? and ?Expert? qualify one for being a Marine.

[Mark A. Oblazney]

The 1977 letter  of Billy Joe Lord and the brazen writing and TV debate from Nicholas B Lemann indicate there
was some sort of a tug of war ongoing, and this evidence is of cover up at the highest reaches....cover up of....what?
Nicholas Lemann's father Thomas, uncle Stephen, and step-aunt Baldwin are all mentioned in this 1990
obit of his step-grandmother, widow of his grandfather, Monte Lemann:

....and who can forget that Frank Pace joined the board of Time, Inc. just after Henry Luce's sister's husband,former publisher of Time Maurice "Tex" Moore and his law partner Roz Gilpatric negotiated the merger of Pace's General Dynamics
with "Henry Crown, Inc.?"
April 22, 1960 WSJ:

   and so it goes......

[Walt Cakebread]

The three Marine categories are:
1.   Marksman (lowest)
2.   Sharpshooter (medium)
3.   Expert (expert)
In 1956, Oswald qualified as ?Sharpshooter?, the medium category. The same category as another Marine, Charles Whitman, who went crazy and killed about 16 people with a rifle in 1966. The longest range was over 400 yards. Like Oswald, it had been about 7 years since he had received his Marine training.
Most Marines only qualify at the lowest rating, ?Marksman?, which is still very good. One must still prove one is accurate at 200, 300 and 500 yards. In 1959, without retraining, Oswald scored as ?Marksman? which is a good score, although run of the mill for a Marine.

Maybe you should be the one to go check your facts and review the shooting categories of being a Marine.

In 1957 any Marine recruit who fired less than sharpshooter was a "spombleprofglidnoctobunsbird"

[John Iacoletti]

The three Marine categories are:
1.   Marksman (lowest)
2.   Sharpshooter (medium)
3.   Expert (expert)
In 1956, Oswald qualified as ?Sharpshooter?, the medium category. The same category as another Marine, Charles Whitman, who went crazy and killed about 16 people with a rifle in 1966. The longest range was over 400 yards. Like Oswald, it had been about 7 years since he had received his Marine training.

Disingenuous.  Whitman had been out of the Marines for 19 months.  Oswald had been out of the Marines for 4 years.  And Oswald barely qualified as Marksman (by one point) 4 months before his discharge.

[Eddie Haymaker]

whitman was an expert marksman before he joined up

guns from childhood

chalk and cheese